Belt disengaging mechanism



u y 1952 E. P. DU PONT 2,603,979

BELT DISENGAGING MECHANISM Filed Aug. 2, 1948 2- SHEETS-SHEET 1 i] s2 I 5511""15: 8 58 56 is 66 M h v W F G. 3. INVENTOR.

EL EUTHERE PAUL DU PONT ATTORNEYS July .22, 1952 "E. P. DU FONT 2,603,979

BELT DISENGAGING MECHANISM .Filed Aug. 2, 1948 2 SHEETSSHEET 2 INVENTOR.

ELEUTHERE PAUL DU PONT BYE ATTOR N'EY-S atented July 22, 1952 BELT DIS ENGAGING MECHANISM 1 4 Eleuthere Paul du Pont, Montchanin, Del.; Equitable Trust Company and John Hemphill, ex-.

ecutors of. Eleuthere Paul du Pont, deceased, assignors to Benjamin Bonneau du Pont, Fair- 1 field, Conn.

Application August 2, 1948, Serial No. 41,947

I as f, I 1 4 This; invention relates to belt drives. More particularly, it relates to a belt drive utilizing a V,-belt and means for disengaging the V.-belt from a pulley. 1 Where flat belts are. used v it is well known to shift the driving belt from the drivingpulley onto aloose pulley. Indeed, such an arrangement is one of the major benefitsroija belt drive since other commonly usedmeans for disconnecting a driving shaft-and a driven shaft. involve much greater complexity and'cost. Despite the numerous advantages of a v -belt, includin decreased Width requirements and less slippage, it will'be apparent that, when such a belt is used, the ability to shift the belt ontoa loose pulley is lost.

Claims, (Cl. 74-2425) Thus other means for disengaging aV-beltirom the driven pulley have been sought but heretofore a satisfactory solution has not been found. It is, therefore, the broad object of this invention to provide means for disengaging a V-belt fromapulle'yl 4 An additional object of this invention is to provide means which will, in addition to disengaging a V-b'elt from a"pulley,"'will provide positive means 'for' reengaging the belt with the pulley 3 V 'Th'ese and/other objects of this invention will be made apparent from a reading of the'description in connection with the following drawings,

inwhich:.. I j I Figure l is a side elevation of the belt disengaging mechanism;

' Figure 2 is a planviewof the belt disengaging mechanism shown in Figure 1;-

Figure 3 is a section taken on the line indicated at3+3inFigurel; j Figure 4 is a sideelevation'of a modified belt disengaging mechanism;'and j Figure 5 is a plan view of the mechanism shown in Figure 4'. V j

As shown in Figures 1- through 3, a, driving shaft 2 is mounted in vertical'supports 4 and 6. Between vertical supports '4 and 6 is'located driving pulley 8, which is fixedly secured to shaft 2.

A V-belt l0 runs between the driving pulley 8 -an d*a driven pulley l2. Driven" pulley I2 is =which'may be suitably supported and connected o tothe mechanism to be driven;

from the driving pulley 6, pin 38 is removed and lever 24 is pivoted at 26 so as to -move pulleyl2 towards pulley 8, thus reducing the distance be- 2 V I v A lever 24 is pivotally connectedto theshaft 22, at 26. The lever 24 extends downwardlyyto shaft H which it supports in a bearing at 28. Lever 24 passes between a pair of fixed 2metal guide plates 30 and 32 The guide plates have openings 34 which are located on a radius having shaft 22 *as a centerand so as to be in register with opening 36 in lever 24. A pin 38'passes through openings 34 and 36 to securelever 24 in the desired position. 9

The lever 24 extends upwardly from pivot point r bottom and top of the channel'members 40 and '42, respectively, but betweenthe sides of these members. ,Channe1 member 40 is connected to vertical support members 44 and--45 by levers 48 and .46, respectively, and to vertical support members 50 and 51 by levers 54 and .5 2, respectively.

Channel member 42 is connectedto vertical support members 44 and 45 by lever'56 and an identical lever on the opposite side of the channel member which is .not shown and is connected to vertical support members 50 and 5| .bylever 58 and an identical lever on the oppositeside of the channel member which is 'not' shown All of these levers connecting the channel members 40 and 42 to the vertical support members 44, 45,50 and'5l arepivotally connected to both the channel members and the vertical support members, being retained. in p'ositionby means "i cotterpins 60 to facilitate their ready removal.

v Channel member 40 is connected'to shaft I4 by a pair of oppositely disposed levers 62 and 64. Channel member 42 is similarly connected to shaft M by a pair of oppositely disposed levers B6 and a lever, not shown, which is identical and oppositely disposed to lever 66. The levers connecting the channel members 40 and 42 to shaft l4 are pivotally connected to both shaft I4 and the, channel members.

*When it is desired to disengage the V-belt l0 tween these two pulleys and providing slaclg in 'belt |0. Simultaneously, through the leverscon:

necting channel shaped members 40 and 42 to complete lubricating system which requires no shaft M, the channel members 40 and 42 are attention and hence may run unattended for long forced outwardly and to the right as dictated by periods of time. If the belt which is to be used the levers connecting the channel members to only intermittently is connected to the internal support members 54, 45, 50 and 51. As the chan- 5 combustion engine by a flat belt loose pulley type nel members advance towards the right, they drive or by a clutch mechanism and gearing, take up the slack in belt I0, provided by' there results constant operation of the majority motion of pulley l2, and act to form a new path of the transmission parts. Generally, the infor belt In which carries it clear of p y as stallations of such transmission units require Shown y the broken lines n Figure 1. It will constant attention in order to insure their proper be a arent-tna'tathe disengaging mechanism acts zlub ieationy to form a path fdr'theV-belt lfl W-hic h gradually r wnp eap arent thaeth f gefi egi-n mechcha es in shape and loca 0 as to Carry the anism in accordance with this invention not only V-belt Cle Of the driving p y y which @1665; Ye -permits the use of a V-belt but further provides not, at any time, materially chang in 1 g .a power vtranmsission unit which is completely at This insures that there will be noexcessives'lack re t "whe 51-, use, t n i at n d ri so that the V-belt Will a w ys b E eiWGE P. therperiod fof non-use, all wear and noise. When h Sides of the channel j l fen utilized to dii a bQat pump as discussed above, Thus, when it is desired to reengage the belt'with.' i p at freedom from tt t t the driven pulley, the reverse operation' 'oftthezi .flei ibeitfafivelx t as it is desired to use the disengaging mechanism will, in a positive manpump a uide the V-belt i0 backintothe-lg l f lf 5-; 51 Theembodi nents illustrated and described are, In Figures 4 and a Second Qdl of of course, merelyillustrative and applicant does this invention is illustrated. 'A driving shaft-T0. ag desire to be limitedethereby except as indicarries a driv pulley A v-belt 14 provides 0 cated by the following iclaims, it being apparent E'a driving.xconnection between i g pul ey 72 athat' numerous inodiflcati'onswithin the scope of *andidrivenpulley--76, Drivenp ulley 'it is rnourgtmvn y made 1 e "ed on ai-shaft It wh j fi r y' supportsiga What :I claim and desire to protectib'y Letters and 82., "A pulley 1-84; is rotatably secured to rod Patent 86-fixedlyisecu'red to lever'8'i. Pulley-t3'i s rotat 1, Atdriyin 'ulleixan fir rablyesec 0 9 9 h 0 S B 7 t e 3O belt iconnectii ig sai pulle ys, 92. =Leve'rs -81 and 1 9 V- a e v a y vsecured. 9 members positicrfed between the reah'es of' said :ehait. 0- 933mm are'iplvotallyseWred belt and respectively adjacent the opps'ite tov r d 92 at and m, et v reaches ofth'e bltglevrs'"pivotally secured to and are plvotally secured to b 1 1 2 support'ineiiib'ers"andtosaid ehannermember a gth ough rod-lflfi-e \Bell'crmk shaft conneting'the firet d'riven pulley to a-"s'eccur ed 'tosupport 108 at H 0. l'tod H2 secured-gto findlufivn ,bfinyflevers Connecting l kshafftgtb -one end of bellcrank l fl' lcarriesi-pulley H4 and ae a cmem zjb' 'lt m' as handle 5- A SDTiI1g is'securedtoben i 'orid driven pulley to a thirddriven pulley;a' lever 1*? i i??? 99, wh "24mg pivote on the-aids df the third driven pun'ey eta j i et e q e r 1 9 .f

s'upportin'g saidshaftso thatthe-firstdriven-pul- The l d e e sm e h m 3 w, ley-canbemoved towardsthe drivingpulleyand diF the 'Wbelt H dlsengaged efrom i the channel *members can be moved' 'apa'rt to ip l r lifbv {neansfof l j'carry-the'beltb'etwenthe driving pulley and-the by i Q n l' e m m 4, w k path 4'5 first driven pulley clear of the driving pulley an d clear of thedr v g'p 'Q e means to secure the lever pivotedon'theakis of "the belt'ffl with the drivingpulley,'handlel ilfi is I third a n pulley e e I L fi i a d vwh e w s 9?e lp'- 2r'A driving pulley and'a driven'p'ull'ey, bit to uIlie ersQB and $8 to the left nturll connetingsaid pulleys, a pairof membersposins leverjl tomove-"counterclockwise and 'IQYQ g tioned between'the reaches of the beltand re- .0f q e" T1118 m Sf ca ry g spectively adjacent the opposite reaches 'oflth'e "pulleys'84and88t0'tHeHeft-and aitert eybelt,"ineans' connected to the driven'pulley to i'p'assedavertical'plane through shaft -10',;towards m y i pulleyvtowardjthe v m jtmhltmfat'whichpoint the belt-willalrealdy 5 members to movesaid members apartto 'ca'rry grieve become en ge a'w f glt u 7, lt "cl ar or the driving 'puney when. said 'pfin' fla aet 'a an'idler pulley-tokee'p' slaq driven pulley is moved toward said driving eu' drb' ltl'd, ,Itjwill b'enoted thatspringizfl 'puiley; f I j I h fi l m fl l g e' t n-, 3. A drivingpully endennveepiiuey albeit gaging mechanism in the disengag g p'osi e'o 'conncting'saidpulleys, 'a'pair of channel memand'al soto keep'tlie's'lac'kput er theb'eltthrough berspositioned between the reaches "drithe blt -and respectively embracing opposite reaches-of the medium'efipune f4. I

' It w ill be apparent'that, in order'to' a'gain'disth belt, means connectedto the driven pulleyto ien'gageithelbelt from pulley 12,it'is merely neces- "move said pulley toward the driving une' la d saryf'tofp handle W & d y fih "'65 means connected tosaid driven pulley'and said c'aiu'sesthe elements of h' me h' n m toniqve ih channel 'mem'bers-tomove said channelm'embers *the reverse mannerffrom that described above, apart to c'arrythe' belt clear'of the drli/ingipfine y re's'ulting'in the'positioning-ofpulleys-84 and '88 when said driven ,epulleyqsmoved a "said as shown to carr y the belt 1'4 clear of pulley-J 2.- 1 driving 'pulley. v v

Furtheradvant'ages of the-disngagirigmch-" '4. Afdriving pulley and l f un agbelt anism can-be-mor'e fully appreciated by conside .connectingfsaidpulleys, a-pai ofchannermem;

'eriri'g its -ai licatien te-tne driving of "a p e e i n betweenthe reaches of theibelt from an-internal -"co'i'nbustion *engine which is and r'espectivelyadjacent theopposite-reachesof itheimainpfiwetplant ofia'boat. Insuch aninthebelt m eans connected to the drivenpulley to -staiiation, the internal combustion-Engine hasa*7! move said'pulley toward t ei fi pep e fin means connected to said driven pulley and said .channel members to move said channel members members to move said members when said driven pulley is moved.

ELEUTHERE PAUL nu PONT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 10 Number Name Date 367,891 Canning Aug. 9, 1887 402,758 Medart May 7, 1889 

